1、BRITISH STANDARD BS EN 60695-5-1:2003 Fire hazard testing Part 5-1: Corrosion damage effects of fire effluent General guidance The European Standard EN 60695-5-1:2003 has the status of a British Standard ICS 29.020 BS EN 60695-5-1:2003 This British Standard was published under the authority of the S
2、tandards Policy and Strategy Committee on 20 June 2003 BSI 20 June 2003 ISBN 0 580 42086 8 National foreword This British Standard is the official English language version of EN 60695-5-1:2003. It is identical with IEC 60695-5-1:2002. It supersedes BS EN 60695-5-1:1993 which is withdrawn. The UK par
3、ticipation in its preparation was entrusted to Technical Committee GEL/89, Fire hazard testing, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or
4、European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to inclu
5、de all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquir
6、ies on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a back co
7、ver. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60695-5-1 NORME EUROPENNE EUROPISCHE NORM February 2003 CENELEC European Committee for Electrotechnical Standardization C
8、omit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60695-5-1:2003 E ICS 2
9、9.020 Supersedes EN 60695-5-1:1993 English version Fire hazard testing Part 5-1: Corrosion damage effects of fire effluent - General guidance (IEC 60695-5-1:2002) Essais relatifs aux risques du feu Partie 5-1: Effets des dommages de corrosion des effluents du feu - Guide gnral (CEI 60695-5-1:2002) P
10、rfungen zur Beurteilung der Brandgefahr Teil 5-1: Korrosionsschdigung durch Rauch und/oder Brandgase - Allgemeiner Leitfaden (IEC 60695-5-1:2002) This European Standard was approved by CENELEC on 2003-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat
11、e the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard e
12、xists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national el
13、ectrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.NE 066-59-5:12003 -2 - Foreword The text of document 8
14、9/556/FDIS, future edition 2 of IEC 60695-5-1, prepared by IEC TC 89, Fire hazard testing, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60695-5-1 on 2003-02-01. This European Standard supersedes EN 60695-5-1:1993 The following dates were fixed: latest date by whic
15、h the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2003-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-02-01 This European Standard should be read in conjunction with IEC
16、 60695-5-2 and IEC 60695-5-3. Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60695-5-1:2002 was approved by CENELEC as a European Standar
17、d without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: ISO 7384 NOTE Harmonized as EN ISO 7384:1995 (not modified). _ Page2 EN6069551:2003 CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative references.5 3 Definitions6 4 Fire s
18、cenarios and fire models7 5 General aspects of the corrosivity of fire effluent 8 5.1 Corrosion damage scenarios .8 5.2 Types of corrosion damage effects9 5.2.1 Metal loss9 5.2.2 Moving parts becoming immobile.9 5.2.3 Bridging of conductor circuits.9 5.2.4 Formation of a non-conducting layer on cont
19、act surfaces 9 5.3 Factors affecting corrosivity.10 5.3.1 The nature of fire effluent 10 5.3.2 The corrosion environment 11 6 Principles of corrosion damage measurement.11 6.1 Introduction.11 6.2 Generation of the fire effluent12 6.2.1 Selection of the test specimen which is to be burned.12 6.2.2 Se
20、lection of the fire model.12 6.3 The assessment of corrosive potential.12 6.3.1 General.12 6.3.2 Indirect assessment.12 6.3.3 Simulated product testing13 6.3.4 Product testing 13 6.4 Consideration of corrosivity test methods 14 7 Relevance of data to hazard assessment .16 Annex ZA (normative) Normat
21、ive references to international publications with their corresponding European publications .17 Bibliography19 Figure 1 Different stages in the development of a fire within a compartment 8 Figure 2 Evaluation and consideration of corrosion damage test methods15 Table 1 General classification of fire
22、s (ISO/TR 9122-1)8 Table 2 Summary of corrosivity test methods.13 Page3 EN6069551:2003 INTRODUCTION The risk of fire should be considered in any electrical circuit. With regard to this risk, the circuit and equipment design, the selection of components and the choice of materials should contribute t
23、owards reducing the likelihood of fire even in the event of foreseeable abnormal use, malfunction or failure. The practical aim should be to prevent ignition caused by electrical malfunction but, if ignition and fire occur, to control the fire preferably within the bounds of the enclosure of the ele
24、ctrotechnical product. All fire effluent is corrosive to some degree and the level of potential to corrode depends on the nature of the fire, the combination of combustible materials involved in the fire, the nature of the substrate under attack, and the temperature and relative humidity of the envi
25、ronment in which the corrosion damage is taking place. There is no evidence that fire effluent from electrotechnical products offers greater risk of corrosion damage than the fire effluent from other products such as furnishings, building materials, etc. The performance of electrical and electronic
26、components can be adversely affected by corrosion damage when subjected to fire effluent. A wide variety of combinations of small quantities of effluent gases, smoke particles, moisture and temperature may provide conditions for electrical component or system failures from breakage, overheating or s
27、horting. Evaluation of potential corrosion damage is particularly important for high value and safety- related electrotechnical products and installations. Technical committees responsible for the products will choose the test(s) and specify the level of severity. The study of corrosion damage requi
28、res an interdisciplinary approach involving chemistry, electricity, physics, mechanical engineering, metallurgy and electrochemistry. In the pre- paration of this part of IEC 60695-5, all of the above have been considered. IEC 60695-5-1 defines the scope of the guidance and indicates the field of ap
29、plication. IEC 60695-5-2 provides a summary of test methods including relevance and usefulness. IEC 60695-5-3 provides details of a small-scale test method for the measurement of leakage current and metal loss caused by fire effluent. Page4 EN6069551:2003 FIRE HAZARD TESTING Part 5-1: Corrosion dama
30、ge effects of fire effluent General guidance 1 Scope This part of IEC 60695 provides guidance on the following: a) general aspects of corrosion damage test methods; b) methods of measurement of corrosion damage; c) consideration of test methods; d) relevance of corrosion damage data to hazard assess
31、ment. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references,
32、 only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60695-1-1:1999, Fire hazard testing Part 1-1: Guidance for assessing the fire hazard of electrotechnical products General guidelines IEC/TS 60695-5-2:2002, F
33、ire hazard testing Part 5-2: Corrosion damage effects of fire effluent Summary and relevance of test methods IEC/TS 60695-5-3, Fire hazard testing Part 5-3: Corrosion damage effects of fire effluent Leakage current and metal loss test method 1IEC 60754-1:1994, Test on gases evolved during combustion
34、 of materials from cables Part 1: Determination of the amount of halogen acid gas IEC 60754-2:1991, Test on gases evolved during combustion of electric cables Part 2: Determination of degree of acidity of gases evolved during the combustion of materials taken from electric cables by measuring pH and
35、 conductivity IEC 60754-2, Amendment 1 (1997) ISO/TR 9122-1:1989, Toxicity testing of fire effluents Part 1: General ISO 11907-2:1995, Plastics Smoke generation Determination of the corrosivity of fire effluents Part 2: Static method ISO 11907-3:1998, Plastics Smoke generation Determination of the c
36、orrosivity of fire effluents Part 3: Dynamic decomposition method using a travelling furnace _ 1To be published. Page5 EN6069551:2003 ISO 11907-4:1998, Plastics Smoke generation Determination of the corrosivity of fire effluents Part 4: Dynamic decomposition method using a conical radiant heater ISO
37、/IEC 13943:2000, Fire safety Vocabulary ASTM D 2671 00, Standard Test Methods for Heat-Shrinkable Tubing for Electrical Use 3 Terms and definitions For the purposes of this part of IEC 60695, the following definitions, some of which have been taken from ISO/IEC 13943, apply. 3.1 corrosion damage phy
38、sical and/or chemical damage or impaired function caused by chemical action ISO/IEC 13943, definition 25 3.2 corrosion target sensor used to determine the degree of corrosion damage, under specified conditions NOTE This sensor may be a product, a component, or a reference material used to simulate t
39、hem. ISO/IEC 13943, definition 26 3.3 critical relative humidity level of relative humidity that causes leakage current to exceed a value defined in the product specification 3.4 fire effluent totality of gases and/or aerosols (including suspended particles) created by combustion or pyrolysis ISO/IE
40、C 13943, definition 45 3.5 fire effluent decay characteristics physical and/or chemical changes in fire effluent due to time and transport 3.6 fire effluent transport movement of fire effluent away from the location of the fire 3.7 fire scenario detailed description of conditions, including environm
41、ental, of one or more stages from before ignition to after completion of combustion in an actual fire at a specific location or in a real- scale simulation ISO/IEC 13943, definition 58 Page6 EN6069551:2003 3.8 ignition source source of energy that initiates combustion (SO/IEC 13943, definition 97 3.
42、9 leakage current electrical current flowing in an undesired circuit 3.10 smoke visible part of fire effluent ISO/IEC 13943, definition 150 4 Fire scenarios and fire models During recent years, major advances have been made in the analysis of fire effluents. It is recognized that the composition of
43、the mixture of combustion products is particularly dependent upon the nature of the combusting materials, the prevailing temperatures and the ventilation conditions, especially access of oxygen to the seat of the fire. Table 1 shows how the different stages of a fire relate to the changing atmospher
44、e. Conditions for use in laboratory scale tests can be derived from the table in order to correspond, as far as possible, to full scale fires. Fire involves a complex and interrelated array of physical and chemical phenomena. As a result, it is difficult to simulate all aspects of a real fire in lab
45、oratory scale apparatus. This problem of fire model validity is perhaps the single most perplexing technical problem associated with all fire testing. General guidance for assessing the fire hazard of electrotechnical products is given in IEC 60695-1-1. After ignition, fire development may occur in
46、different ways depending on the environmental conditions, as well as on the physical arrangement of the combustible materials. However, a general pattern can be established for fire development within a compartment, where the general temperature-time curve shows three stages, plus a decay stage (see
47、 Figure 1). Stage 1 (non-flaming decomposition) is the incipient stage of the fire prior to sustained flaming, with little rise in the fire room temperature. Ignition and smoke generation are the main hazards during this stage. Stage 2 (developing fire) starts with ignition and ends with a rapid ris
48、e in fire room temperature. Spread of flame and heat release are the main hazards in addition to smoke during this stage. Stage 3 (fully developed fire) starts when the surface of all of the combustible contents of the room has decomposed to such an extent that sudden ignition occurs all over the ro
49、om, with a rapid and large increase in temperature (flashover). At the end of Stage 3, the combustibles and/or oxygen have been largely consumed and hence the temperature decreases at a rate which depends on the ventilation and the heat and mass transfer characteristics of the system. This is known as the decay stage. Page7 EN6069551:2003 In each of these stages, a different mixture
